Low noise amplifier (T466E)

Found in 1948 MIT documentation, this 4-tube amplifier is characterized by its low noise level.

Power booster (CB8993E)
Found in a 1980s documentation, this amplifier uses an operational aplifier of the time with two...
Voltage Controlled Oscillator 2 (CB12017E)
This VCO or Voltage Controlled Oscillator uses common components. The circuit generates signals that...
4mA to 20 mA Generator with the XTR115 and PGA309 (CB12534E)
The presented circuit is suggested by Texas Instruments (www.ti.com) in its Application Report...